FIELD: mining, particularly coupling means to connect casing pipes or tubing strings in oil and gas wells.
SUBSTANCE: coupling to connect pipes provided with tapered threads at ends thereof comprises clutch with cylindrical recess and elastic bush. Inner bush surface may cooperate with tapered thread run-out and with outer pipe surface. Outer bush surface may cooperate with cylindrical recess surface of the clutch. Metal ring is installed in joint at clutch end. The inner metal ring surface is provided with bead adapted to engage elastic bush arranged in the metal ring. Outer bush surface may cooperate with inner surface of metal ring after pipe and clutch screwing together. The bush is installed to provide cylindrical clutch groove filling.
EFFECT: prevention of sealing lubricant forcing-out, increased coupling protection against corrosive medium and electrochemical corrosion, increased reliability of well operation and reduced material consumption.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CONNECTION OF CASING PIPES OR TUBING STRINGS WITH TAPER THREAD ON ENDS IN OIL AND GAS WELLS | 2008 |
|
RU2406004C2 |
| CONNECTION OF CASING STRINGS OR PUMP-COMPRESSOR PIPES WITH CONICAL THREADED ENDS IN OIL AND GAS WELLS | 2005 |
|
RU2294477C2 |
| UNIVERSAL CASING HEAD FOR CONNECTIONS OF CASING STRINGS ON WELLHEAD | 1999 |
|
RU2173764C2 |
| PROTECTOR FOR PROTECTION OF FORCE CABLE IN A WELL | 2003 |
|
RU2250345C1 |
| JOINING OF PUMP RODS, CASING PIPES, PUMP-COMPRESSOR TUBES IN OIL AND GAS WELLS | 2002 |
|
RU2268434C2 |
| LOCKING DEVICE | 2010 |
|
RU2447343C2 |
| CHECK VALVE | 2004 |
|
RU2285179C2 |
| PROTECTOR | 2009 |
|
RU2403373C1 |
| DEVICE FOR PROTECTION OF POWER CABLE IN A WELL | 2002 |
|
RU2249667C2 |
| DEVICE OF WELLHEAD EQUIPMENT | 1996 |
|
RU2171357C2 |
